1232561389450 has 12 divisors (see below), whose sum is σ = 2292564184470. Its totient is φ = 493024555760.

The previous prime is 1232561389447. The next prime is 1232561389453. The reversal of 1232561389450 is 549831652321.

It is an interprime number because it is at equal distance from previous prime (1232561389447) and next prime (1232561389453).

It can be written as a sum of positive squares in 3 ways, for example, as 457318120009 + 775243269441 = 676253^2 + 880479^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1232561389394 and 1232561389403.

It is not an unprimeable number, because it can be changed into a prime (1232561389453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12325613845 + ... + 12325613944.

Almost surely, 2^{1232561389450} is an apocalyptic number.

1232561389450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1232561389450 is a deficient number, since it is larger than the sum of its proper divisors (1060002795020).

1232561389450 is a wasteful number, since it uses less digits than its factorization.

1232561389450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24651227801 (or 24651227796 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 49.

The spelling of 1232561389450 in words is "one trillion, two hundred thirty-two billion, five hundred sixty-one million, three hundred eighty-nine thousand, four hundred fifty".